Wbench



July 22, 1930. H, 0, BEcKLlN 1,770,906

WRENCH Filed July 16, 1928 gnwntoz Patented July Z2, 1930 ,UNITED STATES PATENT oFFic-E HERMAN O. BCKLIN, OF SEATTLE, WASHINGTON i WRENCH Application led .Tilly 16,

erally stated, is to perfect the construction and arrangement of the Wrench parts to render the same more simple, strong and du rable, and more convenient and eiiicient in operation.

An important object of the invention is to provide a. v Wrench of the above character which is formed of relatively few and simple parts that may be readily removed for cleaning or repair.

Other objects and advantages of the invention Will appear in the following description.

The invention consists in the novel construction, adaptation and combination of parts hereinafter described and claimed.

In the accompanying drawing,-

Figure 1 is a side elevation of a Wrench eini bodying my improvements; Fig. 2 is a transverse sectional view on line 2 2 of Fig. 1; Fig. 3 is a perspective View of the yoke; and Fig. i is a similar view of the lock member for the movable jaw.

In said drawing, the reference numeral 5 represents a bar member having at one end a handle portion 6, and at its other end a jaw 7; hereinafter termed the xed jaw. The top surface of the bar is formed with teeth 8 extending entirely across the bar. Formed with or rigidly secured to the jaw end of said bar is a frame 9 provided above the bar with an opening 10 which serves as a guideway for the shank 11 of the movable jaw 12.

At its end opposite the jaw 12, the shank 11 is pivotally connected by means ef a pin 13 With an end of a yoke 111 which is mounted upon the bar member 5 for movement With the movable jaw 12 longitudinally of the bar.

The pivotal connection aHorded by the pin 13 permits movement of the jaw 12 independently of the yoke in the plane of the wrench, and limited by the vertical opening of the guideway 10.

15 represents a spring provided Within the traine 9 to act against the shank 1.1. of the 1928. Serial No. 293,006.

movable j avv for yieldablyV holding the latter to the Work. The construction of the yoke 14. which constitutes an important part of the present invention comprises a hollon7 block With an opening 16 (Fig. 3) extending longitudinally therethrough and of a transverse section to fit the bar 5 for relative sliding movement.

Intermediate its length the yoke is provided With a. recess 17 extending from the plane of its top surface 18 of the yoke to below the top of the opening 16 for the bar 5, the surfaces 191 and 201 of the yoke portions 19 and 20 at the front and rear, respectively, of said recess are arranged parallel and at .right angles to the said bar. y

The portion 19 is, moreover, bifurcated to provide at the front lugs 21 with a space 22 therebetween to accommodate the shank 11 and which latter is connected to the yoke by engaging the referred to pin 13 in apertures, such as 23, provided in the lugs.

Located between the yoke portions 19 and (ifi is a block 28, hereinafter termed the dog, I

having plane front and rear end surfaces 19 and 20 to the front and rear respectively of the yoke recess 17. A

The bolt 24 is arranged at one side of the midwidth of the dog and yoke, and is provided with a head 241 within the yoke recess 22 and is secured in place by means ofv a nut 27 .taking screw threads provided on the bolt and engaging against the rearrend of the yokeQA x Said dog isprovided with a fin element 281 extendingupwardly from the recess 17 and thence rearwardly over thetop of the yoke element 20, wherebyV the operatorpushing laterally Withhis fingers or. thumbagainst the tin will impart rotary movement ofthe dog to cause the teeth thereof to be brought Cil into or out of engaging relation with the teeth of the bar member.

The position of the dog in its engaged or locking position is illustrated by full lines in Figs. l and 2, and in its disengaged position by dotted lines 28ZL in Fig. 2.

3l represents a spring pressed ball carried by said dog and is adapted to engage in cav1- ties 30 or 301 provided in the yoke for releasably connecting the dog thereto in its coupled or disengaged positions with respect to the bar member of the wrench.

32 represents a split pin adapted for detachably securing the pin 13 to the yoke and permitting the pin 13 to be removed to release the movable j aw, whereupon the bolt 24 can be withdrawn from the yoke for the removal of the dog.

In operation the wrench is adjusted a'tter turning the dog 28 into its dotted line position 28n4 (Fig. 2) position to disengap'e t dog from the rack teeth 8 of the wrencl -bar 5.

The disengagement of the dog releases the yoke which may then be manually shifted lengthwise of the bar to carry the movable jaw into engageable relation with the work.

lVith the wrench thus adjusted the dog is returned from its dotted line 28a position into its full line position in Fig. 2 resulting in the reengagement of the dog with the bar 5 tor locking the yoke thereto and the movable jaw l2 in position to cooperate with the fixed jaw 7.

It is to be noted that in the present invention, that the yoke 14 is of a single piece mounted to slide upon the wrench. bar, and that the yoke is provided with a recess open at the top of the yoke whereby the dog is adapted to be readily removed or replaced and that it is held in place between thrust bearings by means of a removable bolt.

What I claim, is,-

l. In a Wrench, the combination with the bar member having teeth on its upper surface and a fixed jaw, of a yoke slidable uponthe bar, said yoke having a recess opening up- Wardly away from the bar between two post elements of the yoke, a movable jaw pivoted on the yoke, a locking dog located Within said recess in contiguous bearing relation with the opposing faces of said posts, a bolt engaged yin both of said posts and serving to support the dog for rotary movement, said dog having teeth adapted by turning the dog about the axis of saidbolt to be brought into and from locking relation With the bar teeth, said dog having a thumb-piece integral therewith and extending upwardly from said recess and thence over onelot1 said yoke posts, and spring actuated latch devices carried by said dogthumb extension and engageable in said last named yoke post for' releasably holding the dog` in either its engaged or disengaged relation selectively with respect tothe bar teeth.

2,. In ,a Wrench, the combination with the bar member having teeth on its upper surface and a xed jaw, of a yoke slidable upon the bar, said yoke having a recess opening upwardly away from the bar between two post elements disposed one in front of the ther, and a second recess provided in the foremost of said posts, a bolt engaging in said posts and extending through the first named recess and into the second recess, a removable jaw pivoted on the yoke, a locking dog rotatably connected within the first named recess to said bolt, said removable jaw having a shank extending into the second named recess, and serving when attached to the yoke to prevent the removal oi? said bolt to release the dog` 'for its removal 'from the yoke, said dog having teeth adapted by turning the dog to be moved into and from locking relation with the bar teeth, said dog having a thumb-piece integral therewith and e1;- tending over one ot said yoke posts. and latch devices carried by said thumb-piece and engageable with said yoke oost .For releasably holding the dog;` in its engaged or discugaged relation with Tespect to the har teeth for securing the yoke in an adjusted position to the bar.

Signed at Seattle, lVashington, this 22 day of June 1928.

HERMAN O. BECKLIN. 

